Lubricating-pump for multicylinder-engines.



llldllfED TATE PATENT OFFlCE.

PAUL I-IENTSCHKE, OF ST. LOUIS, T'IISSOURI, ASSIGNOR TO BUSCH-SULZER BROS.-DIESEL ENGINE COMPANY, OF ST.

LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

LUBRICATING-PUMP FOR MULTICYLINDER-ENGINES.

Specification of Letters Patent.

Patented Oct. 22. 8.

Application filed February 10, 1917. Serial No. 147,783.

To aZZ whom it may concern:

Be it known that 1, PAUL Hnxrscmm, a citizen of Germany, residing in St. Louis Missouri, have invented the following described improvements in Lubricutirig-Pinups for Multicyllimiter-Engines.

The invention relates to oil pumps for the pressure lubricating systems of C()nll)l.lS tion engines and more especially multiple plunger pumps for such engines and simila 1' apparatus, and the invention consists in the structure of the oil supply and pump mechanism which provides certain economies of manufacture and in the relative arrangement of the parts or" such structure which provides it superior degree oi compactness and facility for access and control, and also in the functional reletionship of the principal parts whereby certain useful and important results are obtained, all of which will be made apparent to those skilled in this art, from the Cl( I)l.7li)n and drawings.

In the said drawings.

Figure 1 represents in vertical section a preferred and illustrative embodiment of the invention, certain parts being shown in elevation;

Fig. 2 is e horizontal cross-section of Fig. 1, broken away to show the section at different horizontal levels, as will be apparent;

Fig. 3 is a. section of Fig. l on the line III-ill of that figure, but also showing a portion of the overflow Well 19; and.

Fig. 4: is o detail of the oil. control valve on line IV J'V.

The design of the pump taken for illustration is shown in the foregoing drawings as applied to the vertical shaft 1 of a vertical multi-cylinder internal combustion engine, which shaft may be understood to be the drivin connection between the engine crank she and an o erhead cam shaft. The pumping and oil delivery apparatus are directly mounted on the vertical housin 2 of such shaft and the pumping ilungers are driven by gearing contained wit in the housing. Such gearing comprises in the case of a vertical shaft a pair of spiral gears 3,

one of which is loose upon the shaft 1 and driven by means of the clutch 4, and :1 clutch lever 5. When the pump driving shaft is not vertical, it will be understood that corresponding modifications may be made in the angle of the gear teeth preserving howcvcr' the unclutching facility and the pump mechanism on the-shaft lu'iusing. Such mounting provides obvious advantages in 'i'cspcct to the removal and repair of the pump mechanism and is included as part of the present invention, although the iuvention is not limited thereto.

i The pump body is illustrated as formed by a one-piece casting, cored out to form the necessary chambers and bored with the requisite number of pump cylinders G. and has bolted to its inner face the brackct supports 7 for the pump-shaft S. which brackets are thus contained within the shaft housing. The pump cylinders t are bond in two horizontal and parallel rows. those of the upper row being oii'set or siaggcrcd h respect to those in the lower row, and the pun'lping plungcrs 9 for ouch row are all conncctcd to a single cross-hood 10, which are respectively connected to the eccentric straps 11 at opposite ends of the pump shaft 8. The straps for the upper cross-head are spaced 180 degrees from those for the lower cross-head, so that the plunger-s alternate in direction.

All this pump drive mechanism is contained Within the housing and is quickly rcmovable with the pump by simply unbolting the latter. The several plungcrs Work in their respective cylinders with practically no clearance and the outlet valves 12 thereof are contained in valve chambers communicating with the lower side of each pump cylindeircclose to its end wall and are formed by boring the pump body from its under side. The delivery passages from these outlet valves are formed by horizontal bores 13, leading through appropriate couplings 14;. to their respective oil delivery pipes. Each outlet valve is similarly related to its pump cylinder, and in order that each valve the mounting of chamber may have adequate metal and odor a minimum resistance to flow, the upper row of pump cylinders is disposed somewhat farther out from the ump shaft than the lower row, so that in e eCt the outer ends of the upper cylinders overhang the outer ends of the lower cylinders. In this manner the row of outlet valves for the upper cylinders, becomes located outside of the corresponding row for the lower cylinders, and each valve of the outer row is also somewhat higher than those of the lower row. The valve caps 15 for each valve, and the coupling devices 14, are thus given proper Wrench clearance, notwithstanding the close arrangement of the pump cylinders. The

dotted lines in Fig. 1, and the sections at.

diiferent levels in Fig. 2, indicate the extent of the lateral offset of the upper and lower cylinders. The staggered relation of the pump cylinders and their lateral offset, whereby the described disposition of the outlet valves is brought about, will be observed to constitute an important factor in the compactness of the mechanism as a Whole. The pump plungers 9 for the upper and lower rows of cylinders, are desirably of equal length, and the eccentric straps of the upper cross-head are made longer in order to accommodate the extent of lateral offset.

The oil supply is formed in the superstructure of the pump body and is constituted by a main oil chamber 16, the forward side of which is provided ,with a hinged glass cover, permitting visual inspection of the interior. This chamber is divided by vertical partitions into a row of similar oil receptacles 18, one directly over each pump cylinder, and this row of receptacles coextensive in length with the superposed rows of pump cylinders. Excess oil in these rcccptacles may overflow the rear wall 19 thereof. into the channel 20, common to all the rece taclcs and thence throu h the hole 21 into the interior of the housing 2, whence it may eventually find its way o the engine crank case. Each oil receptacle is connect ed through its bottom with the pump cylinder directly beneath it, by means of a. hole 22 drilled part way into said bottom, of relatively large diameteix and continued lhroug'h into the pump cylinder with a much smaller diameter. Where it forms an inlet port uncovered by the pump plunger only when the latter reaches its extreme inward or suction strokc, about as indicated in'thedrawings.

This'location of the inlet passage allows the plunger to create a very considerable vacuum effect in the cylinder before the inlet is opened and thcrebv produces quick and vigorous inflow of Oll from the Oll chamber,

particularly etlieacious'in moving viscous lubricating oilthrough inlet passages which are necessarily of small cross-scction Where mes es they join their pumping cylinders. Inasmuch as the oil receptacles are at a common level, the inlet ducts to the lower cylimlers are longer than the intervening ducts leading to the upper cylinders, but by virtue. of-the wide upper part of each duct. the rc sistance to flow is substantially the same in all of them.

The oil supply to the receptacles l5. i taken from an oil tank or reservoir 23, which has a separable connection to the pump structure at 24, and within said struc ture the oil is delivered through individual drip nozzles 95, into each oil receptacle but under a double control,--lhat is to say. each drip is subject'to individual control in the nature of a fin adjustment to suit the particular oil line served by its pump cylinder. and also subject to a dominating control which may be utilized to floodthc entire ries of receptacles, or to shut off the oil supply from all of them. For this purpose. the rotary valve 26 is mounted in the main body of the apparatus, coextensive and parallel with the row of pump cylinders and superposed above them. Such valve body is provided with an exterior handle 27. and its barrel part is cut with a series of crosschannels 28, adapted to register simultaneously with the passages 29 and with the entrances to the drip nozzles 23. when the valve handle 27 is set in the proper position, and when so set, it will be epparcnt that the reservoir oil may ii w freely in the nozzles 25 and to all [he ivcoptm-ir lb. thereby flooding the latter. hen the "alvc barrel .26 is turned slightly (to the position indicated in Fig. l.) the liood passuges 29 are thereby closed and conmiunicationbetween the reservoir and drip nog" lbs is th b way of illu series of passages Zi each of which is controilrd b a screw-threaded needle valve 31, of which there is one for each -',:ross-chzmncl and drip nozzle. 'lhescneedle valves are adjustable from the exterior of the mechanism and are provided with setscrews 32 to lock their individual adjust inents. A further turn of the valve 26 will obviously close the needle valve ports 30 and thereby shut off the supply of oil to the pumps, it being thus ap )arcnt that a single valve controls two supply passages, the one freely opcnec and adapted for floodinglthc mechanism, and the other being independently regulable and isolated from its neighbors.

It will of course be understood that during the operation of the engine, the valve member 26 is set as shown in 1, so that c bearings included in the lubricating system, 4

naeaose may be primarily supplied with lubrication by operating the pump mechanism by hand, for which purpose the pump shaft 8 is extended through the housing Where the crank,

shown in dotted lines in Fig. 2, may be applied to it, the clutch t being, of course opened to permit the independent rotation of the pump shaft.

The principles of construction involved in the ap aratus above described will be recognized without detailed explanation, and it will be apparent that they may be applied to pump mechanism in various forms of em botlimcnt differing in appearance from the particular structure taken for illustration, and all such forms are intended to be inchided in the claims appended hereto.

I claim:

1. In a pressure lubricating pump, a pump body having a superstructure containing an overflow receptacle delivering oil to the pump cylinder, an oil reservoir to supply said receptacle, and a regulable delivery passage between said reservoir and receptacle.

In a pressure lubricating pump, a pump body having a superstructure containin a receptacle delivering oil to the pump cy inder, an oil reservoir to supply the receptacle, a regulable delivery passage between the reservoir and receptacle, and independent means for flooding the receptacle with oil.

3. In a lubricating pump, a pump body having a superstructure containing an overflow receptacle delivering oil to the pump cylinder, an oil reservoir to supply said'receptacle. a sight feed delivery from said reservoir to the receptacle, means for regu lating said delivery, and independent means for closing said delivery.

l. A. lubricating pump having a drip feed to each of a plurality of pump cylinders, means for regulating the drip, and single means for flooding all the cylinders with oil independently of the drip adjustment.

5. A lubricating pump having several pump cylinders each having a supply receptacle connecting therewith, a drip feed to each receptacle and means for flooding said receptacle independent of the drip adjustment. 6. In a pressure lubricating pump, the combination with. the pump cylinder and plunger of an oil supply therefor and two passages conducting oil from said supply to the pump cylinder. one of said passages containing a regulable restriction to flow, and a single valve member controlling both passages.

7. In a multi-cylindcr oil pinup, a pump body containing parallel rows of pump cylinders and provi a l with a superposed oil supply receptacle for each cy inder in both rows, a regulable "jll drip to each ieccptacle,

independent means for adjusting the drip, and a single means for shutting oil the drip to all said receptacles.

S. In a niulti-cylindcr body containing upper and lower parallel rows of pump cylinders and each provided with an oil inlet duct leading from a suitable superposcd oil supply and terminating in a port opening in its pump cylinder which is uncovered by the plunger in said cylinder at the end of its suction stroke, and means for regulating the flow to said duct.

9. In a multi-cylinder oil pump, a pump body containing upper and lower parallel rows of pump cylinders and provided with a parallel row of oil receptacles, one for each cylinder disposed above said rows of cylinders, and a regulable oil drip for each receptacle.

10. In a multiple cylinder oil pump, a pump body containing parallel rows of pump cylinders in staggered relation, a parallel row of oil receptacles situated above said cylinders and having oil delivery ducts to each of them, and a parallel row of oil drip nozzles respectively and independently supplying said receptacles.

11. In a multi-cylinder oil pump, body containing oil pump, a pump 1 a pump parallel superposed rows of pump cylinders, the upper row being laterally olfset with respect to the lower row, and each cylinder having an outlet valve chamber, said valve chambers being thereby disposed in parallel rows and at dili'crent ele vations.

12. In a multi-cylinder oil pump, a pump body comprising in a single structure two superposed rows of pump cylinders, a coextensive rovt ofoil receptacles above the pump cylinders, each receptacle having a duct delivering to one of said cylinders, an

outlet for excess oil from said receptacles,

and individual oil drips to each receptacle.

13. A. lubricating pump having several pump cylinders each provided with a supply receptacle, an ind vidually regulable sight feed to each receptacle and means independent of such regulation for flooding all said. receptacles.

14. A lubricating pump having several pump cylinders, an individually regulable sight feed to each and a single means for optionally closing, all said feeds or flooding said cylinders independently thereof.

15. A lubricating pump having several cylinders, an overflow supply receptacle for each, a common escape passage for the overflows therefrom, and independently regulable oil feeds to each said receptacle.

16, A multicylinder lubricating pump comprising upper and lower rows of parallel pump c inders, a substantially coextensive row of supply receptacles directly superposed ,above the same, a common overflow escape passage from each receptacle and an individually regulable oil feed to supply the same.

17. A lubricating pump having upper and 5 lower rows of pump cylinders, alternately acting plungers therefor, means including a clutch through which the engine drives said plungers and means for manually operating said plungers.

18. A lubricating pump organization comprising an engine-driven shaft. a housing mangoes therefor, -a pump structure removably mounted on the housing and comprising pumping agencies and a pump shaft carried thereby and a gear on said shaft adapted to 15 be driven by said engine-driven shaft and separable therefrom with the pump structure when the latter is bodily removedl In testimony whereof, .I have signed this specification.

P nL HENTSCHKE. 

